Hi, I traced the cache operations of R3000 and R4000 (the Kernel version is 2.6.27).I found the flush_cache_all() is empty, but it is still called by some function, e.g. remap_area_pages() .I don't understand why the function is empty and what's the difference between flush_cache_all() and
__flush_cache_all(). Does calling a empty flush_cache_all() make some problem ?